Entry-resistant security file construction

ABSTRACT

A security file having a cabinet open at the front with mullion means dividing the open front into a series of drawer receiving pigeonhole compartments. Spaced outer and inner shells form the cabinet, the inner shell including a duplex walled entryresistant shell comprising an outer sheet of aluminum and an inner sheet of abrasive steel. Insulation material fills the space between the outer and inner shells where an insulated security file is desired. Drawers are slidably located in the pigeonholes and a gang-lock bolt mechanism which extends through the drawer fronts and mullion means is operated by a handle of the main locking mechanism. The gang-lock mechanism includes dual upper and lower bolts located at the corners of each drawer and tied together by tie straps. A bolt strap is rigidly connected at one end to each tie strap and pivotally connected at its other end to a rotatable cam plate. A plunger operated bolt is fixed to the lower tie strap in the upper or main locking drawer and operates a plunger in the next-adjacent mullion means. Each such plunger contacts the upper end of a gang-lock control rod, the lower end of which contacts the plunger in the next-lower mullion means. Horizontally disposed side bolts are pivotally connected by actuating arms to diametrically opposite points on a cam disc in each drawer front. Detents are provided which prevent locking of any drawer unless the same is fully closed, and release means is provided for releasing said detent means when the drawer is fully closed. An anti-wedge plate is provided in each drawer front and protective angles are welded thereto in positions to permit locking of the bolts in each drawer to pass therethrough. A protective cover is provided for a locking bar bolt which connects the lower tie strap in the main locking drawer with the cam plate. Protective device are provided to impede drilling of the ends of lock bolts and the lower ends of the lowermost control rod of the gang-lock. Protective devices and anti-wedge means are provided in various areas of the mechanism to impede access to or actuation of the mechanism if attacked by externally applied force.

United States Patent [1 1 Shoop ENTRY-RESISTANT SECURITY FILECONSTRUCTION [75] Inventor: James D. Shoop, Canton, Ohio [73] Assignee:Diebold, Incorporated, Canton,

Ohio

[22] Filed: July 15, 1971 21 Appl. No.: 162,926

[52] U.S. Cl. ..109/59, 70/417, 312/217 [51] Int. Cl. ..E05b 65/46 [58]Field of Search .....l09/53, 59, 80; 312/215-221; 70/417, 422

Primary Examiner-Dennis L. Taylor Attorney-John l-l. Bishop and JosephFrease [5 7 ABSTRACT A' security file having a cabinet open at the frontwith mullion means dividing the open front into a series of drawerreceiving pigeonhole compartments. Spaced outer and inner shells formthe cabinet, the inner shell including a duplex walled entry-resistantshell comprising an outer sheet of aluminum and an inner sheet ofabrasive steel. Insulation material fills the space between the outerand inner shells where an insulated security tile is desired. Drawersare slidably located in the pigeonholes and a gang-lock bolt mechanismwhich extends through the drawer fronts and mullion means is operated bya handle of the main locking mechanism. The gang-lock mechanism includesdual upper and lower bolts located at the corners of each drawer andtied together by tie straps. A bolt strap is rigidly connected at oneend to each tie strap and pivotally connected at its other end to arotatable cam plate. A plunger operated bolt is fixed to the lower tiestrap in the upper or main locking drawer and operates a plunger in thenext-adjacent mullion means. Each such plunger contacts the upper end ofa gang-lock control rod, the lower end of which contacts the plunger inthe next-lower mullion means. Horizontally disposed side bolts arepivotally connected by actuating arms to diametrically opposite pointson a cam disc in each drawer front. Detents are provided which preventlocking of any drawer unless the same is fully closed, and release meansis provided for releasing said detent means when the drawer is fullyclosed. An anti-wedge plate is provided in each drawer front andprotective angles are welded thereto in positions to permit locking ofthe bolts in each drawer to pass therethrough. .A protective cover isprovided for a locking bar bolt which connects the lower tie strap inthe main locking drawer with the cam plate. Protective deviceareprovided to impede drilling of the ends of lock bolts and the lower endsof the lowermost control rod of the gang-lock. Protective devices andanti-wedge means areprovidecl in various areas of the mechanism toimpede access to or actuation of the mechanism if attacked by externallyapplied force.

18 Claims, 19 Drawing Figures PATENTEL MAY 2 9 I975 SHEET 2 BF 7INVENTOR JAMES D. SHOOP ATTOR N EYS cab/35,714

PATENIE mm 91975 SHEET 3 OF 7 INVENTOR JAMES D. SHOQP 7W &

ATTORNEYS PATENTEL Y 91975 SHEET 5 [1F Y INVENTOR JAMES D. SHOOPATTORNEYS ENTRY-RESISTANT SECURITY FILE CONSTRUCTION CROSS-REFERENCE TORELATED APPLICATION The present invention is an improvement upon some ofthe features of copending application Ser. No. 2,240, filed Jan. 12,l970, now U.S. Pat. No. 3,637,277, of Jan. 25, 1972, and includes drillresistant balls-inplastic plates as disclosed in copending applicationSer. No. 67,338, filed Aug. 27, 1970.

BACKGROUND OF THE INVENTION drawer sections arranged in superimposedrelation, and

wherein the individual drawers are provided with individual lockingmechanisms collectively controlled by a single master lock. The drawersare suspension mounted within a housing having preferably armored wallsand each drawer has a drawer head. Gang-lock mechanism locks all drawerswhen in closed position. The drawers include a main locking drawer andone or more auxiliary drawers. A combination lock is located in the mainlocking drawer for locking the gang-lock mechanism when in closedposition. The drawer heads are armored and the combination lock isprotected to impede access to the locking mechanism and combinationlock.

2. Description of the Prior Art Prior security files of the general typereferred to have been made with either insulated or noninsulatedcabinets. The security files provided with insulated cabinets have beenof the general type of the Henkle U.S. Pat. Nos. 2,803,203 and2,887,965, with cabinets like in Paulos et al. U.S. Pat. No. 3,095,838and with ganglock mechanism of the type shown in Blauvelt U.S. Pat. No.2,956,525. The noninsulated security file as now made by applicantsassignee, Diebold, Incorporated, has been made as shown in saidcopending application Ser. No. 2,240 now U.S. Pat. No. 3,637,277 of Jan.25, 1972. Different dies and metal assemblies are required for the twoclasses of files.

The present invention provides a single construction for both theinsulated and noninsulated-security files so that the same mechanicaland metal assemblies can be made for both classes of files on the sameproduction line.

SUMMARY OF THE INVENTION The objectives of the invention includeproviding a security file in which the same cabinet and gang-lockmechanism is used in both insulated and noninsulated files; the samestructure of cabinet provided for the noninsulated class of files beingadapted for the insulated files by filling the shells and drawer headswith insulation; locating the top and bottom dual locking bolts closerto the corners to make the drawer head more rigid when locked to resistbending or prying from the side edges; significantly increasing thediameters of the dual locking bolts to resist bending of the bolts;providing bolt reinforcing angles through which the dual lock bolts andthe side bolts project; increasing the diameters and lengths of the sidebolts so that the connections thereof with the actuating arms willoverlap the lock plate so that the lock plate will assist in resistingbending of the side lock bolts; providing a spring biased detent armwhich engages the actuator arm for one of the side bolts in each drawerfor holding the side bolts unlocked; providing a novel cover for thegang-lock link for protecting its pivotal connection with the cam plate;providing balls-in-plastic protective plates to surround and protect thecombination lock; providing a simple spring biased U-shaped triggercomprising a blocking arm normally projecting through a portion of themullion means into a mullion bolt or plunger receiving opening toprevent movement of the gang-lock mechanism when such drawer is open anda release leg projecting through the beyond the mullion means into thepath of movement of the adjacent drawer; providing anti-wedge means toprevent forced wedging of various parts of the locking mechanism;providing an inner duplex-wall forced-entry-resistant shell comprisingan outer sheet of aluminum and an inner sheet of abrasive steel todefeat forced entry by a hole saw as well as by a wedge instrument;providing high tensile steel frame means for the cabinet to resistbowing; and providing a new security file structure which achieves theindicated objectives simply, effectively and inexpensively and solvesproblems and satisfies needs existing in the art.

These objectives and advantages are obtained by the security fileconstruction which is resistant to forced or surreptitious entryincluding cabinet means open at the front, a series of mullions dividingthe open front into a series of drawer-receiving pigeonholecompartments; the cabinet comprising an outer shell of aluminum withside, top and back braces of high tensil steel and an inner shellincluding a duplex-walled entry resistant shell comprising an outersheet of aluminum and an inner sheet of abrasive'steel; heat and coldinsulation material between said shells where an insulated file isdesired; a file drawer movably mounted in each pigeon hole compartment,each file drawer'having a drawer head; the file drawers including a mainlocking drawer and at least one auxiliary drawer; gang-lock boltmechanism comprising upper lock bolts connected by a tie strap and lowerlock bolts connected by a tie strap in each drawer; a vertical boltstrap connected to each upper tie strap and pivotally connected to arotatable cam plate in the corresponding drawer, a vertically inclinedgang-lock link rigidly connected to the lower tie strap in the mainlocking drawer and pivotally connected to the rotatable cam platetherein; a vertical bolt strap connected to the lower tie strap in eachauxiliary drawer and pivotally connected to the corresponding rotatablecam plate; a lock plate in each drawer head; horizontally disposed sidebolts in each drawer, actuating arms for the side bolts pivotallyconnected to the corresponding cam plate; the connection of said sidebolts with the actuating arms overlapping the lock plate; a springbiased detent adapted to engage a notch in one actuating arm of eachdrawer to hold the bolts in unlocked position; reinforcing anglesthrough which the dual locking bolts and side bolts are located; ananti-wedge plate in each drawer front to which said angles are welded; anovel protective cover for the gang-lock link; balls-in-plasticprotective plates surrounding and protecting the combination lock in themain locking drawer which controls rotation of the cam plate therein; aspring biased shouldered plunger vertically slidably located through anopening in each mullion means; a spring biased trigger having a blockingarm normally projecting through a portion of each mullion means into amullion bolt receiving opening to prevent movement of said shoulderedplunger when such drawer is open and a release leg projected through andbeyond the mullion means into the path of movement of the adjacentdrawer; anti-wedge means to prevent forced wedging of various parts ofthe locking mechanism; and a vertically slidable rod in each auxiliarydrawer operated by the gang-lock in the main locking drawer'andcontacting the corresponding shouldered spring biased vertically movableplunger in the corresponding mullion means.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of theinvention illustrative of the best mode in which applicant hascontemplated applying the principles is set forth in the followingdescription and shown in the accompanying drawings, and which areparticularly and distinctly pointed out and set forth in the appendedclaims;

FIG. 1 is a front elevation of a three-drawer security file (lockedposition) incorporating the improvements of the invention;

FIG. 2 is a vertical sectional view on a slightly larger scale taken online 2-2, FIG. 1;

FIG. 3 is a larger scale vertical section through the main lockingdrawer taken on the line 3-3, FIG. 2;

FIG. 4 is a similar view of an auxiliary drawer taken on the line 4-4,FIG. 2;

FIG. 5 is a vertical section through the main locking drawer taken onthe line 5-5, FIG. 3;

FIG. 6 is an enlarged horizontal section through one of the auxiliaryfile drawers taken on the line 6-6, FIG. 1; 7

FIG. 7 is a fragmentary sectional view on the line 7-7, FIG. 3, showing'the position of the detent in the main locking drawer when thecorresponding side bolt is in locked position;

FIG. 8 is a similar view showing the detent engaged in the notch in theactuating arm when the side bolt is in unlocked position;

FIG. 9 is an enlarged fragmentary section on the line 9-9, FIG. 3,showing the balls-in-plastic plates protecting the combination lock;

FIG. 10 is an enlarged fragmentary section of the same on the line10-10, FIG. 3;

FIG. 11 is an enlarged fragmentary section through the protective coverfor the gang-lock link taken on the line 11-11, FIG. 3;

FIG. 12 is a fragmentary transverse section through the same taken onthe line 12-12, FIG. 3;

FIG. 13 is a fragmentary transverse section through one of the mullionmeans showing the trigger holding the gang-lock in unlocked position;

FIG. 14 is a fragmentary section through the trigger on the line 14-14,FIG. 13;

FIG. 15 is an enlarged section through the drawer fronts on the line15-15, FIG. 2;

FIG. 16 is a fragmentary section on the line 16-16, FIG. 4;

FIG. 17 is a fragmentary sectional view showing the gang-lock for thebottom of the lower drawer in unlocked position;

FIG. 18 is a detached perspective view of the lock plate for one of theauxiliary drawers; and

FIG. 19 is a detached perspective view of the rotatable cam plate in themain locking drawer.

Similar numerals refer to similar parts throughout the drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENT The security file generallydesignated at 1 in FIGS. 1 and 2 includes a five-sided file cabinet 2having side walls 3, a rear wall 4, a top wall 5 and a bottom wall 6 allof which may be insulated or not as hereinafter described. Each of thewalls (FIGS. 5 and 6) comprises an outer shell 7 and an inner shell 8each of which may be fabricated from light gauge preferably steel sheetmembers in the usual manner to form the cabinet wall compartments withinwhich insulation material may be contained as disclosed in said Pauloset al. US. Pat. No. 3,095,838. Overlapping flanges 9 and 10 of the outershell-may be spot-welded together.

In accordance with the invention a duplex-walled, supplemental,forced-entry-resistant shell, generally indicated at 11 and best shownin FIGS. 5 and 6, is incorporated in the wall structure of the cabinet2. The duplexed-walled shell 11 comprises abrasive steel inner sideplates 12 and 13, inner top plate 14, and inner back plate 15, andaluminum outer side plates 16 and 17, outer top plate 18, and outer backplate 19.

As shown in FIG. 2 the-duplex-walled supplemental shell 11 may includethe abrasive steel inner bottom plate 20 and the aluminum outer bottomplate 21.

The upper edge of the inner back plate 15 may be welded to the rear edgeof the inner top plate 14 as indicated at 22 in FIGS. 2 and 5 and thelower edge of the inner back plate 15 may be welded to the rear edge ofthe inner bottom plate 20 as indicated at 23 in FIG. 2. The outer bottomplate 21 has an upturned and slightly intumed hook-shaped flange 24 atits rear edge which may be welded to the lower edge of the outer backplate 19 as indicated at 25 in FIG. 2. A similar flange 26 is formed atthe rear edge of the outer top plate 18 and may be welded to the upperedge of the outer back plate 19 as indicated at 27.

Similar flanges 28 and 29 (FIG. 6) are formed at the side edges of theouter back plate 19 and welded to the rear edge portions of the outerside plates 16 and 17, respectively, as indicated at 30 and 31.

Each outer side plate 16 and 17 has an outward vertically extendingoffset portion 32 connected by the shoulders 33 and 34 with the frontand rear vertically extending flanges 35 and 36. The outer shell 7 maybe provided with sound-deadening liners 37, 38 and 39, respectively.These liners may be attached to the corresponding portions of the outershell by a suitable adhesive, such as Pliobond made by the B. F.Goodrich.

Co. I

At the front open side of the cabinet the inner shell 8 is offset as at40 at each side, top and bottom and reduced and the shaped metalreinforcing members 41 ber ll and a hardened steel plate 47 isinterposed therebetween.

The open front of the cabinet is divided into pigeonholes for slidablyreceiving file drawers in conventional manner, by the mullion meansindicated generally at 48 (FIGS. 1, 2, 5 and if an insulated securityfile is desired, suitable heat and cold insulation material 49 may beplaced between the inner and outer shells as best shown in H68. 2, S and6. if a noninsulated security tile is desired this insulation materialis omitted so that the same mechanical and metal assemblies can be madefor both classes of files on the same production line.

A file drawer is slidably located within each pigeonhole in the cabinet.There may be two, three, four or five drawers as desired. in thedrawings three drawers are shown, the upper drawer indicated generallyat 50 (FIGS. l and 2) being the main locking drawer, the other drawers511 being auxiliary drawers.

As best shown in FIGS. 5 and 6, the front of each drawer is formed witha head including an outer plate 52 and an inner plate 53 joined at top,bottom and side edges by a continuous web edge member 54 shaped at itsforward portion to conform to the offset front portion 30 of the top,bottom and sides of the cabinet and the corresponding front portion 55of the mullion means, which offset portions define the open frame end ofthe pigeonhole compartments in which the front head of each drawer 50and 51 is seated when the drawer is in closed or locked position.

A steel anti-wedge plate 56 is spaced inwardly from and substantiallyco-extensive with the outer plate 52, and the space therebetween may befilled with insulation material as indicated at 57. The inner or backplate 53 is spaced from the anti-wedge plate 56, as shown. The offset inthe web member 54, as shown in FIG. 6, is located between the frontplate 52 and back plate 53 adjacent the edges of the anti-wedge plate56. The remalnder of each drawer may be of any conventional constructionas indicated at 1193 in FIG. 5. The locking mechanism is of the samegeneral type as disclosed in Blauvelt US. Pat. No. 2,956,525. However,Blauvelt does not have any anti-wedge plate such as 56.

The rnultl-locking bolt locking mechanism in each drawer is mounted upona lock plate. The lock plate 58 (FlGS. 3, 5 and E5) in the main lockingdrawer is slightly different from the lock plate 59 (FIGS. 4, 6, l5 andiii) in each of the auxiliary drawers. in FIG. 18 one of the auxiliarydrawer lock plates 59 is shown in detail.

Referring now more particularly to FIG. 5, the lock plate 5% for themain locking drawer has a horizontal flange 60 at its lower edgeterminating in the upright terminal flange 61. The flange 60 has acut-out 62 to receive the reinforcing plate 63 of mild steel which iswelded as at 64 to the anti-wedge plate 56. The upper edge of thelocking plate 58 abuts the inner side of the depending flange 65 of thechannel member 66.

The combination lock 67 is mounted upon the lock plate 58 as shown in.FIGS. 3, 5 and 15 and is surrounded and protected by the ball-in-plasticplates 68. As best shown in H6. 5 the latch arbor ferrule 69 is locatedthrough suitable apertures in the outer plate 52, anti-wedge plate 56and lock plate 58 and the latch arbor is journalled therethrough. Thecam plate 71 is journalled upon the ferrule 69 between the spacer rings'72.

The drive bar 73 is fixed upon the conical portion 74 of the arbor bythe nuts 75 and has a drive pin 76 engaged in an aperture in the camplate 71.-A Nylon spacer 77 is located around the outer end of the arbor70 between the adjacent end of the ferrule 69 and handle 78. I

The lock bolts in the main locking drawer, include the two spaced topbolts 79 which are of considerably larger diameter than thecorresponding top bolts in U.S. Pat. No. 2,956,295 and which are locatedcloser to the corners to make the drawer head more rigid when locked andto resist bending or prying of the drawer heads from the side edges andto resist bending of the bolts.

The top bolts 79 are connected by the top tie strap 80. The bolt strap81 has its upper end welded or otherwise rigidly attached to the top tiestrap and its lower end is pivotally connected as at 82 to the cam plate71. The movement of the cam plate is very slight and as in the BlauveltPatent there is sufficient clear ance for the bolts 79 to permit thesame to be easily moved to locked or-unlocked position by properrotation of the cam plate. The lower bolts 83 are also of largerdiameter than in the Blauvelt Patent and located closer to the cornersof the drawer for the reasons given above and are connected together bythe lower tie strap 84.

The gang-lock plunger operating bolt 85 is fixed at its upper end to thecentral portion of the tie strap 84 and is vertically slidably locatedthrough the tubular member 86 located through the gang-lock reinforcingplate 63.

The lower end of the locking bar bolt 87 is rigidly attached to thecentral portion of the lower tie strap 84, and the upper end thereof ispivotally attached to the cam plate 71 as indicated at 88. As with thetop bolt assembly, there is sufficient clearance to permit the bolts 83and 85 to be moved to locked or unlocked position.

As best shown in FIGS. 3, 11, 12 and 15 a channel shaped protectivesteel cover 89 is provided for the locking bar bolt 87. One dependingflange 90 of the protective cover 89 is longer than the other andterminates in a right angular terminal flange 91 which is attached tothe lock plate 58 by screws 92. A protective steel bar 93 is welded asindicated at 93a to the lock plate 58 adjacent the edge of the terminalflange 91 to prevent a tool from being driven between the flange91 andthe lock plate 58. A steel reinforcing block 94 is located within thechannel member 89 above the pivotal connection 88 and a steel plate 95may be located between the end of the same and the end flange 96 of thechannel member 89.

The cam plate 71, shown in detail in FIG. 19 has a right angle flange 97to assist in protecting the pivot point 88. Diametrically opposite tothe flange 97 is a narrow stop flange 98 terminating in the angularflange 99 having an aperture 100 therein to receive the hooked end 101of the coil spring 102. The upper end of the spring 102 is connected tothe depending lug 103 attached to or formed upon the inverted channel66.

The upper end of the inner plate 53 (FIG. 5) of the drawer front isconnected to the adjacent depending flange 104 of the inverted channelmember 66 and the depending flange 105 of the continuous web 54-overlapsthe upper end of the inner plate 53.

An access panel 106 normally closes the access opening 107 in the innerplate 53. A horizontal metal strip 108 is attached to the access panel106 at a point spaced from the lower edge thereof and provided with theoffset depending flange 109 which normally over laps the inner plate 53at the lower edge of the access opening 107 when the panel is in theclosed position as shown in FIG. 5. A horizontal metal strip 110 isattached to the access panel 106 at a point spaced from its upper endand provided with an outwardly angled flange 111 which is locatedrelative to the upper edge of the access opening 107 as shown in FIG.when the panel is in closed position. Screws 112 normally connect theupper end portion of the access panel 107 to the upper end portion ofthe inner plate 53.

When it is desired to remove the access panel 106 in order to gainaccess to the interior of the drawer head, the screws 112 are removedallowing the access panel to drop sufficiently so that when tiltedinwardly into the drawer the angular flange 1 11 will clear the upperedge of the access opening 107.

The side bolts 113 are of increased diameter as well as length ascompared with the side bolts of the Blauvelt Patent so that theconnection thereof to the actuating arms 114 will overlap the lock plate58 so that the same will assist in resisting bending of the side lockbolts. The actuating arms 114 are pivotally connected at diametricallyopposite points to the cam plate 71 as shown at 115.

As best seen in FIG. 6, the outer end of each side bolt 113 is receivedin a cup 187 located between the inner shell 8 and the adjacent sideplate 42. The interior of this cup is enlarged at its outer end as shownat 188 and a hardened tool steel disc 189, having convex faces 190, isloosely located therein beyond the end of the adjacent side bolt 1 13.This provides additional protection for the side bolts. If anyoneissuccessful in cutting through the outer shell 7 and the side plate 42at this point and tries to drill through the disc 189 to get at theadjacent side bolt 113, the loosely mounted disc 189 will turn whencontacted by the drill preventing the drill from cutting therethrough.As shown in FIG. 5, the upper ends of the upper dual lock bolts 79 inthe main locking drawer are protected by a similar disc 189a located ina cup 187a just beneath the top plate 43.

The upper and lower dual lock bolts 79 and 83 respectively, of the mainlocking drawer, the upper and lower lock bolts 79 and 129 of theauxiliary drawers, and the side bolts 113 of all drawers are reinforcedby the angle members 116 provided with suitable apertures 117 andsimilar aligned openings in web member 54 through which the bolts pass.The angle members 116 are tied to the anti-wedge plate 56 as by welds118, as shown in FIG. 6. The angle members 116 each are located adjacentthe continuous web member 54 of each drawer head and are rigidly mountedon and extend rearwardly of the anti-wedge plate 56 toward the backplate 53. This is another advantage over the Blauvelt patent in whichthere is no anti-wedge plate and no reinforcing angle members.

A T-shaped protection plate 119 (FIGS. 3, 5, 15 and 19) is welded uponthe cam plate 71 as indicated at 120, in FIG. '19 to protect thecombination lock bolt 121. The upper and lower cutouts 122 and 123,respectively, in this protection plate provide a clearance for the upperbolt strap 81 and the left actuating arm 114, respectively, as viewed inFIG. 15 when the gang-lock mechanism is moved to unlocked position asshown in FIG. 15.

As shown in FIG. 3, when the gang-lock mechanism is in locked position,the stop flange 98 prevents the cam plate 71 from being turnedcounterclockwise because the combination lock bolt 121 is located in thepath thereof. A stop pin 124 is mounted upon the lock plate 58 in thepath of the shoulder 125 on the cam plate 71 to limit turning movementof the cam plate as shown in FIG. 15. A back-up tab- 126 is mounted uponthe lock plate 58 in position to be contacted by the angular flange 99upon the cam plate 71 when the cam plate is moved to the unlockedposition shown in FIG. 15.

Referring now more particularly to the auxiliary drawers as shown inFIGS. 4, 6 and 15, the cam plate 71a is slightly different from the camplate 71 in the main locking drawer. The right angle flange 97, the stopflange 98 and the T-shaped protection plate 119 are omitted. The camplate 710 is rotatably mounted upon a ferrule as shown at 69 in FIG. 5and the latch arbor assembly as shown in FIG. 5 is provided for the camplate for each auxiliary drawer and the same reference numerals areapplied thereto. The cam plate 71a has a shoulder 125a for contacting astop pin 124a on the lock-plate 59 for limiting turning movement of thecam plate in counterclockwise direction. 7

The lower hooked end of the spring 1020 is connected to the angularflange 99a on the cam plate 71a and the upper hooked end of the springis connected to the eye 127 upon the lock plate 59 for normally holdingthe edge 128a of the cam plate 71 against the stop pin 124a in the samemanner that the spring 102 in the main locking drawer holds the edge 128of the cam plate 71 against the stop pin 124 when the parts are inlocked position as shown in FIG. 3.

The dual top bolts 79 and top tie strap 80 are the same as thecorresponding parts in the main locking drawer. The lower dual lockbolts 129 of the auxiliary drawers are somewhat shorter than the lowerlock bolts 83 of the main locking drawer and are tied together by alower tie strap 130. l

A bolt strap 81 is rigidly connected at its upper end to the upper tiestrap 80 and the lower end thereof is pivotally connected to the camplate 71a as indicated at 131. The lower end of the lower bolt strap 132is rigidly connected to the lower tie strap and the upper end thereof ispivotally connected to the cam plate 71a at 133. The side bolts 113 andactuating arms 114 in the auxiliary drawers are the same as thecorresponding parts in the main locking drawer and the actuating armsare pivotally connected to diametrically opposite points on the camplate 71a as indicated at 134.

A detent 135 is associated with one side bolt 113 in each of the drawersas shown in FIGS. 3, 4, 6 and 15 and as shown in detail in FIGS. 7 and8. Each detent is pivotally mounted intermediate its ends upon a bracket136 fixed upon the lock plate 58 or 59 as the case may be. A spring 137is connected at one end the bracket 136 and at its other end to thedetent 135 near the hooked end 138 thereof, for normally urging saidhooked end 138 toward the surface of the adjacent actuating arm 114 whenthe parts are in locked position as shown in FIGS. 3, 4 and 7, or in thenotch 139 of the actuating arm when the parts are in unlocked positionas shown in FIGS. 8 and 15, and the drawer is open, preventing moving ofthe bolts to locked position. When the drawer is closed, as shown inFIG. 6, the re lease pin 191, supported upon the inner shell of thecabinet, will contact the end 192 of the detent 135 raising the hookedend 138 thereof out of the notch 139 so that the gang-lock mechanism maybe turned to locked position.

A plunger 140 (FIGS. and 13) is vertically slidably mounted in a guideopening 141 in the central portion 142 of each mullion means 48 andprovided at a point spaced from its upper end with a shoulder 143adapted to contact theshoulder 144 in the opening 141. A head 145 isprovided at the upper end of the plunger 140 and is of suitable diameterto be slidably received within the upper reduced portion 146 of theopening 141. A coil spring 147 is interposed between the perforate screwblock 148, in the lower end of the opening 141, and the shoulder 143 fornormally urging the shoulder 143 of the plunger 140 into contact withthe shoulder 144 in the opening 141 when the parts are in unlockedposition as shown in FIG. 13.

A gang-lock control rod 149 (FIGS. 4 and is vertically slidably mountedthrough each of the auxiliary drawer heads, the upper end thereof beingreceived within the upper tubular guide 150 mounted through the adjacentsteel reinforcing plate 151 and the lower end of which is slidablylocated through the lower tubular guide 152 mounted through the lowersteel reinforcing plate 153.

An intermediate portion of the control rod 149 is slidably locatedthrough the U-shaped guide 154 upon the lock plate 59. A shoulder 155,spaced from the upper end of the control rod 149 is adapted to contactthe lower end of the upper tubular guide 150 to limit upward movement ofthe control rod 149 as shown in FIG. 13. A coil spring 156 is interposedbetween the lower tubular guide 152 and a shoulder 157 spaced from thelower end of the control rod 149 for urging the control rod 149 upwardintounlocked position as shown in FIGS. 13 and 15. The lower end of theplunger operating bolt 85 is adapted to contact the upper end of theuppermost plunger 140 and push it downward to locked position as shownin FIG. 5. At the same time the lower end of said uppermost plunger 140contacts the upper end of the adjacent control rod 149 pushing it downso that in turn it will push the next lower plunger 140 down to lockedposition which will in turn push the next lower control rod 149 down andso forth.

A trigger mechanism for preventing movement of the gang-lock mechanismwhen a drawer is open, is shown best in FIGS. Sand 13. Such triggercomprises the U- shaped member 158 having a relatively short blockingarm 159 and a relatively long release arm 160. A spring 161 normallyurges the arms 159 and 160 toward the position shown in FIG. 13. As willbe seen from this Figure, when the gang-lock mechanism is in unlockedposition the end of the blocking arm 159 of the trigger isprojected intothe upper reduced portion 146 of the guide opening 141 just below theshoulder 145 upon the plunger 140, preventing downward movement of theplunger to locked position, and the release arm 160 is projectedentirely through the mullion means and into the path of the flange 162of the next adjacent drawer. When said drawer is closed, as shown inFIG. 5, the flange 162 thereof will engage the end of the release arm160 pushing it inward and pushing the end of the blocking arm 159 out ofthe reduced portion 146 of the guide opening and thus out of the path ofthe head 145 of the plunger 140 permitting said plunger to be moved downto locked position by the gang-lock mechanism as shown in FIG. 5.

The lock plate 59 in each auxiliary drawer has a horizontal flange 60aat its lower edge as best shown in FIG. 18 terminating in the uprightterminal flange 61a which has a cut-out 62a to receive the lowerreinforcing steel plate 153 which may be welded to the antiwedge plate56 in the same manner that the reinforcing plate 63 is welded to theantiwedge plate 56 in the main locking drawer.

An angular locking dog 163 (FIGS. 4 and 15) is mounted upon each controlrod 149 of the gang-lock by means of a setscrew 164. A depending leg 165of the locking dog is located in the path of shoulder 125a of the camplate 71a when the parts are in locked position as shown in FIG. 4. Anangularly disposed pin 166 is located in the control rod 149 just abovethe locking dog 163 to prevent forcing of the locking dog upward in theevent the setscrew 164 may be surreptitiously removed by drilling or thelike. A protective angle bracket 167 is spot-welded or otherwiseattached to the lock plate 59 and overlies the locking dog to protectthe same.

A hard steel protective plate 168 (FIGS. 4 and 16) is located on theinner side of the lock plate 59 between the upper clip 169 and angleclip 170 and the pair of similar lower clips 171. An angular clip172-(FIGS. 6 and 18) is fixed to the outer side of the lock plate 59 andcontacts the antiwedge plate 56. Protective angle brackets 173(FIGS. 6,15 and 18) upon the inner side of the lock plate 59 extend over theconnections between the side bolts 113 and actuating arms 114.

The lower end of the gang-lock mechanism for the lowermost gang-lockcontrol rod 149 (FIG. 17) is slidably located through a tubular guide174 carried by a block 175 mounted upon the lowermost lock plate 59. Thelower end portion of the rod 149 is reduced in diameter as indicated at176. A cup 177 is mounted in the lower steel reinforcing plate 153 andaxially aligned with the tubular guide 174. The web 54 is reinforced atthe bottom of the cup 177 as indicated at 178. A steel ball 179 isloosely located in the cup 177 and a'small plug 180 is rigidly mountedin the cup, a coil spring 181 being interposed between the same and theshoulder 182 on the lower end portion of the control rod 149.

The spring 181, small plug 180 and lower portion of the control rod 149are protected by a steel tube 183 which loosely surrounds the same.Anyone trying to drill into the spring 181, lower end of the control rod149, or small plug 180 would be prevented from doing so by the looselymounted steel tube 183 which would turn upon its axis when contacted bya drill. Anyone trying to drill upward from the bottom would be deterredby the steel plates 44 and 184. If these two plates and thereinforcement 178 at the bottom of the cup are penetrated the drillencounters the ball 179 which rotates preventing the drill from cuttingtherethrough.

When the parts are in locked position, as shown in FIGS. 3, 4 and 5, thelock bolt 121 of the combination lock 67, backed up below by the back-uptab 126 is located in the path of the stop flange 98 upon the cam plate71 in the main locking drawer thus preventing counterclockwise rotationof the cam plate to operate the gang-lock mechanism to unlocked positionby rotating the handle 78 of the main locking drawer.

The locking dog 163 upon the control rod 149 in each of the auxiliarydrawers will be located in the path of the shoulder 125a upon the camplate 710 thus preventing rotation of the cam plate 71a by turning thehandle 78 of either of the auxiliary drawers.

When the dial 185 is operated to unlock the combination lock 67, thecombination lock bolt 121 will be withdrawn from the path of theshoulder 125 of the cam plate 71 in the main locking drawer. Then byturning the handle 78 of the main locking drawer in the proper directionthe gang-lock mechanism will be moved to unlocked position as shown inFIG. 15 and the main locking drawer may be pulled open by the grabhandle 186 in usual manner. To then open any of the auxiliary drawers itis only necessary to rotate the cam plate 71a thereof in the properdirection by the handle 78 thereof to withdraw the lock bolts afterwhich the drawer may be opened by the pull handle 186 thereof. As shownin FIG. 15, when a drawer is unlocked the hooked end 138 of thecorresponding detent 135 will drop into the notch 139 of thecorresponding actuating arm 114 holding the lock bolts in unlockedposition. v

In accordance with the invention, a security file is provided in whichthe same cabinet and gang-lock mechanism may be used for both insulatedand noninsulated files so that the same mechanical and metal assembliescan be made for both classes of files on the same production line.

Also, the top and bottom dual locking bolts are increased in diameterand located closer to the corners of the drawer to provide a more rigiddrawer head, so as to resist bending or prying from the side edges whenin locked position.

The increased diameters and lengths of the side bolts provideconnections thereof to the actuating arms that overlap the lock plate toassist in resisting bending of said side bolts.

The spring-biased detent which engages one actuator arm of aside bolt ineach drawer holds the lock bolts in unlocked position and preventslocking of the same when a drawer is open and is automatically trippedwhen the drawer is closed so that the bolts may be moved to lockedposition.

The cover for the gang-lock locking bar bolt protects its pivotalconnection with the cam plate, and the balls-in-plastic protectiveplates surrounding the combination lock protect the same. Thespring-biased U-shaped trigger, having a comparatively short blockingarm and a comparatively long release am, located in each mullion meansprevents movement ofthe gang-lock mechanism when a drawer is open, andis automatically released when the drawer is closed. The inner duplexwall forced entry-resistant shell comprising an outer aluminum sheet andan inner abrasive steel sheet forms means to defeat forced entry by ahole saw as well as by a wedge instrument. Finally, all of the lockingbolts are protected by the reinforcing angles, and the ends of the sidebolts and upper lock bolts also are protected by the loosely mounteddiscs. In addition, the lower end of the lowermost control rod of thegang-lock mechanism is protected by the loosely mounted ball.

In the foregoing description certain terms have been used for brevity,clearness and understanding, but no unnecessary limitations are to beimplied therefrom beyond the requirements of the prior art, because suchwords are used for descriptive purposes herein and are intended to bebroadly construed.

Moreover, the embodiment of the improved construction illustrated anddescribed herein is by way of example, and the scope of the presentinvention is not limited to the exact details of construction.

Having now described the invention, the construction, operation, and useof the file construction, and the advantageous, new and useful resultsobtained thereby; the new and useful construction, and reasonablemechanical equivalents thereof obvious to those skilled in the art, areset forth in the appended claims.

I claim:

1. Security file construction including cabinet means open at the front;the cabinet means including an outer shell and a spaced inner shell, theinner shell being duplex-wall forced-entry-resistant shell, including anouter sheet of aluminum and an inner sheet of abrasive steel; mullionmeans dividing the open front into a series of drawer-receivingcompartments one above another; a file drawer movably mounted in eachcompartment, the file drawers including a main locking drawer and atleast one adjacent auxiliary drawer; each file drawer having a drawerfront head, each drawer front head including a front plate, a hard steelanti-wedge plate spaced inwardly from the front plate, a back platespaced inwardly from the anti-wedge plate, and a continuous web aroundthe edges of the front plate, antiwedge plate and back plate; gang-lockmechanism extending vertically within the drawer front heads between theanti-wedge plates and back plates, the gang: lock mechanism includingspaced upper and lower pairs of lock bolts, one lock bolt being mova-blymounted in a corner portion of each drawer head, a tie strap connectedto each pair of lock bolts, 3 bolt strap rigidly connected to each tiestrap except the lower tie strap in the main locking drawer, a lockingbar bolt rigidly connected to said lower tie strap in the main lockingdrawer; bolt actuating means including cam plate means rotatably mountedin each drawer head, and

means normally spring biasing said cam plate means to locked position;operating handle means connected with each cam plate means for rotatingthe same; means for pivotally connecting each bolt strap and saidlocking bar bolt to the corresponding cam plate means; each mullionmeans between adjacent drawers having a bolt receiving opening, aplunger in each bolt receiving opening, means normally spring-biasingsaid plungers to unlocked position, a plunger operating bolt connectedto the lower tie strap in the main locking drawer and contacting thenext adjacent lower plunger, a control rod vertically slidably mountedin each auxiliary drawer, the ends of said control rod contacting theadjacent upper and lower plungers, means normally spring-biasing saidcontrol rod to unlocked position; a pair of horizontally disposed sidebolts in each drawer front head, a bolt actuating arm connected to theinner end of each side bolt; and means pivotally connecting saidactuating arm, to diametrically opposite points on the adjacent camplate means.

2. Security file construction as defined in claim 1, in whichreinforcing angular members are rigidly attached to the anti-wedge platein each drawer head; and openings formed in said angular members throughwhich the upper, lower and side lock bolts move between locked andunlocked positions.

3. Security file construction as defined in claim 1, in which a lockplate is mounted in each drawer front head between the anti-wedge plateand the back plate; and in which the side bolts have inner endvportionsoverlapping the lock plate, whereby the side bolts are reinforcedagainst bending by the lock plate.

4. Security file construction as defined in claim 1, in which thecabinet means has side walls, in which cups are provided in the cabinetside walls, in which the outer ends of the side bolts are received insaid cups; in which steel side plates extend over the outer ends of saidcups; and in which a steel disc with convex sides is loosely rotatablymounted in each cup beyond the end of the adjacent side bolt.

5. Security file construction as defined in claim 1, in which a lockplate is mounted on each drawer front head between and spaced from theanti-wedge plate and the back plate; in which bracket means are locatedon the lock plate adjacent one side bolt; in which a detent is pivotedintermediate its ends upon said bracket means; in which the detent hasone hook end; in which a notch is formed in the adjacent actuating armreceiving said hook end when the lock mechanism is in unlocked positionand the drawer is open; and in which a release pin is mounted in thecabinet engaging the other end of the detent to remove said hook endfrom said notch when the drawer is closed.

6. Security file construction as defined in claim 1, in which a lockplate is located between and spaced from the anti-wedge plate and theback plate of each drawer front head; in which an'invertedchannel-shaped cover is located over and around said locking bar boltand the pivotal connection thereof to the cam plate; in which meansconnects one edge portion of said channelshaped cover to the lock plate;and in which steel reinforcing plate means extends and is mounted withinsaid channel-shaped cover.

7. Security file construction as defined in claim 6, in which the meansconnecting the channel-shaped cover to the lock plate includes anangular terminal flange on one side of the channel-shaped cover andscrews attaching said terminal flange to the lock plate; and in which asteel protective bar is welded to the lock plate at the edge of saidterminal flange.

8. Security file construction as defined in claim 1, in which acombination lock is mounted in the drawer front head 'of the mainlocking drawer; in which the combination lock has a locking boltengageable with the cam plate normally preventing the cam plate frommoving to unlocked position when said combination lock locking bolt isin locked position.

9. Security file construction as defined in claim 1, in which acombination lock is mounted in the drawer front head of the main lockingdrawer; and in which balls-in-plastic protective plates are located inthe drawer front head surrounding and protecting said combination lock.

10. Security file construction as defined in claim 1, in whichinsulation material fills the space between the outer and inner shells.

11. Security file construction as defined in claim l, in which sounddeadening liners are attached to the top, rear, and side walls of theouter shell between the inner and outer shells.

12. Security file construction as defined in claim 1, in which a tubularguide is mounted in the lowermost drawer front head spaced from thebottom of the drawer front head; in which the lower end of the lowermostcontrol rod extends through said guide; in which a steel cup is mountedin the bottom of said drawer front head vertically aligned with saidguide; in which a short shouldered plunger is located in said cup; inwhich coil spring means is interposed between said short shoulderedplunger and the lower end portion of the control rod and normally holdssaid short shouldered plunger in said cup; in which a steel tube looselysurrounds said coil spring between said tubular guide and said cup; andin which a steel ball is loosely rotatable within said cup.

13. Security file construction as defined in claim 1, in which the camplate means in each auxiliary drawer front head has a shoulder normallylocated in upright position at the top of the cam plate. when thegang-lock mechanism is in locked position; in which an angular lockingdog is provided having a horizontal leg and a depending leg; in whichset screw means secures the horizontal leg to the corresponding controlrod; in which the depending leg normally over-hangs said uprightshoulder on the cam plate when the parts are in locked position; and inwhich a steel pin is angularly mounted in said control rod above thehorizontal leg of said locking dog.

14. Security file construction as defined in claim 1, in which aT-shaped steel protective plate is fixed to the cam plate in the mainlocking drawer and is so positioned that when the cam plate is moved tounlocked position the T-shaped protective plate over-hangs the pivotedend portion of the bolt strap and the adjacent side bolt actuating arm.

15. Security file construction as defined in claim 1, in which eachplunger has a vertically spaced pair of shoulders; in which a U-shapedtrigger is located in each mullion means for holding the gang-lockmechanism in unlocked position when any drawer is open; in which thetrigger has a relatively short blocking arm extending into the adjacentbolt receiving opening in the mullion means and between said spacedshoulders of the corresponding plunger when said drawer is open; inwhich the trigger has a relatively long release leg spring-biasednormally to project through and beyond the mullion means with an endportion located in the path of movement of a flange on the adjacentdrawer when such drawer is moved from open to closed position; in whichsaid blocking leg when in normally projected position blocks saidplunger from being moved through the mullion means opening; and in whichsaid drawer flange engages said release leg to move said blocking legout of blocking position when said drawer is moved from open to closedposition, whereby the gang-lock mechanism cannot be locked unless alldrawers are closed.

16. In security file construction of a type in which a cabinet has top,bottom and side walls open at the front with mullion means dividing theopen front into a series of one above another drawer-receivingpigeonhole compartments, in which offset portions of the cabinet wallsand mullion means define an open frame end for each pigeonholecompartment, in which a tile drawer having a front head is movablymounted in each compartment with offset head edge portions adapted to beseated in and shaped to conform to corresponding cabinet wall andmullion means frame offset portions, and in which a gang-lock mechanismis provided for the drawers; the improvement including in each drawerfront head, a front plate, a steel anti-wedge plate spaced inward of andsubstantially co-extensive with the front plate, a back plate spacedfrom the antiwedge plate, and a continuous web edge member extendingaround and joined to the top, bottom and side edges of the front andback plates, the web member having an offset therein between the frontand back plates adjacent the edges of the anti-wedge plate;

spaced upper and lower pairs of lock bolts and horizontally movable sidebolts mounted in and movable ineach drawer head between the anti-wedgeplate and back plate, one bolt of each pair being mounted adjacent acorner of the drawer head, a tie strap connected to each pair of upperand lower lock bolts; reinforcing angles located adjacent the continuousweb member rigidly mounted on and extending rearwardly of the anti-wedgeplate toward the back plate, one angle for each bolt; and alignedopenings for each bolt through which such bolt moves between locked andunlocked positions formed in each angle and in an adjacent portion ofthe web member.

17. In security file construction of a type in which a cabinet has top,bottom and side walls open at the front with mullion means dividing theopen front into a series of one above another drawer-receivingpigeonhole compartments, in which offset portions of the cabinet wallsand mullion means define an open frame end for each pigeonholecompartment, in which a file drawer having a from head is movablymounted in each compartment with offset head edge portions adapted to beseated in and shaped to conform to corresponding cabinet wall andmullion means frame offset portions, and in which a gang-lock mechanismis provided for the drawers; the improvement including in each drawerfront head, a front plate, a steel anti-wedge plate spaced inward of andsubstantially co-extensive with the front plate, a back plate spacedfrom the antiwedge plate, and a continuous web edge member extendingaround and joined to the top, bottom and side edges of the front andback plates, the web member having an offset therein between the frontand back plates adjacent the edges of the anti-wedge plate; a lock platein each front head intermediate the anti-wedge plate and back plate;horizontally disposed side bolts in each front head operated by thegang-lock mechanism; said side bolts being mounted in and movable ineach drawer head between the lock plate and back plate and adjacent thelock plate; and the side bolts having inner end portions overlapping theadjacent lock plate and reinforced by the lock plate against bending.

18. Security file construction as defined in claim 16 in which a lockplate is located in each front head intermediate the anti-wedge plateand back plate; in which the horizontally movable side bolts are mountedin and movable in each drawer head between the lock plate and back plateand adjacent the lock plate; and in which the side bolts have inner endportions that overlap the adjacent lock plate, whereby the overlappingarrangement and angles reinforce the side bolts against bending.

1. Security file construction including cabinet means open at the front;the cabinet means including an outer shell and a spaced inner shell, theinner shell being duplex-wall forcedentry-resistant shell, including anouter sheet of aluminum and an inner sheet of abrasive steel; mullionmeans dividing the open front into a series of drawer-receivingcompartments one above another; a file drawer movably mounted in eachcompartment, the file drawers including a main locking drawer and atleast one adjacent auxiliary drawer; each file drawer having a drawerfront head, each drawer front head including a front plate, a hard steelanti-wedge plate spaced inwardly from the front plate, a back platespaced inwardly from the anti-wedge plate, and a continuous web aroundthe edges of the front plate, anti-wedge plate and back plate; gang-lockmechanism extending vertically within the drawer front heads between theanti-wedge plates and back plates, the gang-lock mechanism includingspaced upper and lower pairs of lock bolts, one lock bolt being movablymounted in a corner portion of each drawer head, a tie strap connectedto each pair of lock bolts, a bolt strap rigidly connected to each tiestrap except the lower tie strap in the main locking drawer, a lockingbar bolt rigidly connected to said lower tie strap in the main lockingdrawer; bolt actuating means including cam plate means rotatably mountedin each drawer head, and means normally spring biasing said cam platemeans to locked position; operating handle means connected with each camplate means for rotating the same; means for pivotally connecting eachbolt strap and said locking bar bolt to the corresponding cam platemeans; each mullion means between adjacent drawers having a boltreceiving opening, a plunger in each bolt receiving opening, meansnormally spring-biasing said plungers to unlocked position, a plungeroperating bolt connected to the lower tie strap in the main lockingdrawer and contacting the next adjacent lower plunger, a control rodvertically slidably mounted in each auxiliary drawer, the ends of saidcontrol rod contacting the adjacent upper and lower plungers, meansnormally spring-biasing said control rod to unlocked position; a pair ofhorizontally disposed side bolts in each drawer front head, a boltactuating arm connected to the inner end of each side bolt; and meanspivotally connecting said actuating arm, to diametrically oppositepoints on the adjacent cam plate means.
 2. Security file construction asdefined in claim 1, in which reinforcing angular members are rigidlyattached to the anti-wedge plate in each drawer head; and openingsformed in said angular members through which the upper, lower and sidelock bolts move between locked and unlocked positions.
 3. Security fileconstruction as defined in claim 1, in which a lock plate is mounted ineach drawer front head between the anti-wedge plate and the back plate;and in which the side bolts have inner end portions overlapping the lockplate, whereby the side bolts are reinforced against bending by the lockplate.
 4. Security file construction as defined in claim 1, in which thecabinet means has side walls, in which cups are provided in the cabinetside walls, in which the outer ends of the side bolts are received insaid cups; in which steel side plates extend over the outer ends of saidcups; and in which a steel disc with convex sides is loosely rotatablymounted in each cup beyond the end of the adjacent side bolt. 5.Security file construction as defined in claim 1, in which a lock plateis mounted on each drawer front head between and spaced from theanti-wedge plate and the back plate; in which bracket means are locatedon the lock plate adjacent one side bolt; in which a detent is pivotedintermediate its ends upon said bracket means; in which the detent hasone hook end; in which a notch is formed in the adjacent actuating armreceiving said hook end when the lock mechanism is in unlocked positionand the drawer is open; and in which a release pin is mounted in thecabinet engaging the other end of the detent to remove said hook endfrom said notch when the drawer is closed.
 6. Security file constructionas defined in claim 1, in which a lock plate is located between andspaced from the anti-wedge plate and the back plate of each drawer fronthead; in which an inverted channel-shaped cover is located over andaround said locking bar bolt and the pivotal connection thereof to thecam plate; in which means connects one edge portion of saidchannel-shaped cover to the lock plate; and in which steel reinforcingplate means extends and is mounted within said channel-shaped cover. 7.Security file construction as defined in claim 6, in which the meansconnecting the channel-shaped cover to the lock plate includes anangular terminal flange on one side of the channel-shaped cover andscrews attaching said terminal flange to the lock plate; and in which asteel protective bar is welded to the lock plate at the edge of saidterminal flange.
 8. Security file construction as defined in claim 1, inwhich a combination lock is mounted in the drawer front head of the mainlocking drawer; in which the combination lock has a locking boltengageable with the cam plate normally preventing the cam plate frommoving to unlocked position when said combination lock locking bolt isin locked position.
 9. Security file construction as defined in claim 1,in which a combination lock is mounted in the drawer front head of themain locking drawer; and in which balls-in-plastic protective plates arelocated in the drawer front head surrounding and protecting saidcombination lock.
 10. Security file construction as defined in claim 1,in which insulation material fills the space between the outer and innershells.
 11. Security file construction as defined in claim 1, in whichsound deadening liners are attached to the top, rear, and side walls ofthe outer shell between the inner and outer shells.
 12. Security fileconstruction as defined in claim 1, in which a tubular guide is mountedin the lowermost drawer front head spaced from the bottom of the drawerfront head; in which the lower end of the lowermost control rod extendsthrough said guide; in which a steel cup is mounted in the bottom ofsaid drawer front head vertically aligned with said guide; in which ashort shouldered plunger is located in said cup; in which coil springmeans is interposed between said short shouldered plunger and the lowerend portion of the control rod and normally holds said short shoulderedplunger in said cup; in which a steel tube loosely surrounds said coilspring between said tubular guide and said cup; and in which a steelball is loosely rotatable within said cup.
 13. Security fileconstruction as defined in claim 1, in which the cam plate means in eachauxiliary drawer front head has a shoulder normally located in uprightposition at the top of the cam plate when the gang-lock mechanism is inlocked position; in which an angular locking dog is provided having ahorizontal leg and a Depending leg; in which set screw means secures thehorizontal leg to the corresponding control rod; in which the dependingleg normally over-hangs said upright shoulder on the cam plate when theparts are in locked position; and in which a steel pin is angularlymounted in said control rod above the horizontal leg of said lockingdog.
 14. Security file construction as defined in claim 1, in which aT-shaped steel protective plate is fixed to the cam plate in the mainlocking drawer and is so positioned that when the cam plate is moved tounlocked position the T-shaped protective plate over-hangs the pivotedend portion of the bolt strap and the adjacent side bolt actuating arm.15. Security file construction as defined in claim 1, in which eachplunger has a vertically spaced pair of shoulders; in which a U-shapedtrigger is located in each mullion means for holding the gang-lockmechanism in unlocked position when any drawer is open; in which thetrigger has a relatively short blocking arm extending into the adjacentbolt receiving opening in the mullion means and between said spacedshoulders of the corresponding plunger when said drawer is open; inwhich the trigger has a relatively long release leg spring-biasednormally to project through and beyond the mullion means with an endportion located in the path of movement of a flange on the adjacentdrawer when such drawer is moved from open to closed position; in whichsaid blocking leg when in normally projected position blocks saidplunger from being moved through the mullion means opening; and in whichsaid drawer flange engages said release leg to move said blocking legout of blocking position when said drawer is moved from open to closedposition, whereby the gang-lock mechanism cannot be locked unless alldrawers are closed.
 16. In security file construction of a type in whicha cabinet has top, bottom and side walls open at the front with mullionmeans dividing the open front into a series of one above anotherdrawer-receiving pigeonhole compartments, in which offset portions ofthe cabinet walls and mullion means define an open frame end for eachpigeonhole compartment, in which a file drawer having a front head ismovably mounted in each compartment with offset head edge portionsadapted to be seated in and shaped to conform to corresponding cabinetwall and mullion means frame offset portions, and in which a gang-lockmechanism is provided for the drawers; the improvement including in eachdrawer front head, a front plate, a steel anti-wedge plate spaced inwardof and substantially co-extensive with the front plate, a back platespaced from the anti-wedge plate, and a continuous web edge memberextending around and joined to the top, bottom and side edges of thefront and back plates, the web member having an offset therein betweenthe front and back plates adjacent the edges of the anti-wedge plate;spaced upper and lower pairs of lock bolts and horizontally movable sidebolts mounted in and movable in each drawer head between the anti-wedgeplate and back plate, one bolt of each pair being mounted adjacent acorner of the drawer head, a tie strap connected to each pair of upperand lower lock bolts; reinforcing angles located adjacent the continuousweb member rigidly mounted on and extending rearwardly of the anti-wedgeplate toward the back plate, one angle for each bolt; and alignedopenings for each bolt through which such bolt moves between locked andunlocked positions formed in each angle and in an adjacent portion ofthe web member.
 17. In security file construction of a type in which acabinet has top, bottom and side walls open at the front with mullionmeans dividing the open front into a series of one above anotherdrawer-receiving pigeonhole compartments, in which offset portions ofthe cabinet walls and mullion means define an open frame end for eachpigeonhole compartment, in which a file drawer having a front head ismovably mounted in each compartment with offset head edge portionsadapted to be seated in and shaped to conform to corresponding cabinetwall and mullion means frame offset portions, and in which a gang-lockmechanism is provided for the drawers; the improvement including in eachdrawer front head, a front plate, a steel anti-wedge plate spaced inwardof and substantially co-extensive with the front plate, a back platespaced from the anti-wedge plate, and a continuous web edge memberextending around and joined to the top, bottom and side edges of thefront and back plates, the web member having an offset therein betweenthe front and back plates adjacent the edges of the anti-wedge plate; alock plate in each front head intermediate the anti-wedge plate and backplate; horizontally disposed side bolts in each front head operated bythe gang-lock mechanism; said side bolts being mounted in and movable ineach drawer head between the lock plate and back plate and adjacent thelock plate; and the side bolts having inner end portions overlapping theadjacent lock plate and reinforced by the lock plate against bending.18. Security file construction as defined in claim 16 in which a lockplate is located in each front head intermediate the anti-wedge plateand back plate; in which the horizontally movable side bolts are mountedin and movable in each drawer head between the lock plate and back plateand adjacent the lock plate; and in which the side bolts have inner endportions that overlap the adjacent lock plate, whereby the overlappingarrangement and angles reinforce the side bolts against bending.